/* roulang page: index */
:root{
  --c-ink:#171713;
  --c-ink-2:#1f1f1b;
  --c-ink-3:#2a2a26;
  --c-accent:#c47b3d;
  --c-bg:#f7f5f1;
  --c-card:#ffffff;
  --c-border:#e7e2da;
  --c-border-light:#e5e0d8;
  --c-border-dark:#3a3a34;
  --c-text:#26261f;
  --c-text-2:#6e6960;
  --c-text-3:#9c968a;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --radius-btn:2px;
  --radius-card:4px;
  --radius-tag:999px;
  --shadow-1:0 1px 3px rgba(0,0,0,0.04);
  --shadow-2:0 4px 12px rgba(0,0,0,0.06);
  --space-section:clamp(4.5rem,8vw,8rem);
  --ease:200ms ease;
}
*,
*::before,
*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:88px;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:1rem;
  line-height:1.75;
  color:var(--c-text);
  background-color:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-text);text-decoration:none;}
a:hover{color:var(--c-accent);}
p{margin-top:0;margin-bottom:1.5em;}
ul{padding:0;margin:0;list-style:none;}
h1,h2,h3,h4{margin:0 0 .6em;font-family:var(--font-serif);line-height:1.3;}
.grid-container{padding-left:24px;padding-right:24px;max-width:1200px;}
.section{padding-block:var(--space-section);}
.section-head{margin-bottom:clamp(2rem,4vw,3.5rem);max-width:680px;}
.section-head.left{margin-bottom:0;}
.section-head.center{margin-inline:auto;text-align:center;}
.section-eyebrow{
  display:block;
  font-family:var(--font-sans);
  font-size:.8125rem;
  font-weight:600;
  letter-spacing:.15em;
  color:var(--c-accent);
  text-transform:uppercase;
  margin-bottom:14px;
}
.section-eyebrow::after{
  content:'';
  display:inline-block;
  width:36px;
  height:1px;
  background:var(--c-accent);
  vertical-align:middle;
  margin-left:12px;
}
.section-head h2{
  font-size:clamp(1.6rem,2.8vw,2.4rem);
  font-weight:600;
  line-height:1.3;
  margin-bottom:.8rem;
}
.section-head p{
  font-family:var(--font-sans);
  font-size:.9375rem;
  color:var(--c-text-2);
  margin-bottom:0;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:44px;
  padding:0 24px;
  border:1px solid transparent;
  border-radius:var(--radius-btn);
  font-size:.95rem;
  font-weight:500;
  line-height:1;
  transition:background var(--ease),border-color var(--ease),color var(--ease);
  cursor:pointer;
  text-decoration:none;
  white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;}
.btn-dark{background:var(--c-ink);color:#fff;border-color:var(--c-ink);}
.btn-dark:hover{background:var(--c-accent);color:#fff;border-color:var(--c-accent);}
.btn-outline{background:transparent;color:var(--c-text);border-color:var(--c-text);}
.btn-outline:hover{color:var(--c-accent);border-color:var(--c-accent);}
.btn-accent{background:var(--c-accent);color:#fff;border-color:var(--c-accent);}
.btn-accent:hover{background:var(--c-ink);color:#fff;border-color:var(--c-ink);}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.btn-outline-light:hover{color:var(--c-accent);border-color:var(--c-accent);}
@media(max-width:39.9375em){
  .btn{height:40px;padding:0 20px;font-size:.9rem;}
}
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1000;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background 250ms ease,border-color 250ms ease,box-shadow 250ms ease;
}
.site-header.scrolled{
  background:rgba(247,245,241,.92);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--c-border);
  box-shadow:0 1px 10px rgba(0,0,0,.03);
}
.header-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
  transition:height 250ms ease;
}
.site-header.scrolled .header-row{height:56px;}
.logo{
  font-family:var(--font-serif);
  font-size:1.5rem;
  font-weight:700;
  color:#fff;
  letter-spacing:.02em;
  display:flex;
  align-items:baseline;
}
.logo-dot{color:var(--c-accent);margin-left:2px;}
.site-header.scrolled .logo{color:var(--c-text);}
.site-nav .nav-list{display:flex;align-items:center;gap:28px;}
.site-nav .nav-list a{
  font-size:.9375rem;
  color:rgba(255,255,255,.9);
  text-decoration:none;
  transition:color var(--ease);
  position:relative;
  padding:6px 0;
}
.site-nav .nav-list a::after{
  content:'';
  position:absolute;
  left:0;bottom:0;
  width:100%;
  height:2px;
  background:var(--c-accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--ease);
}
.site-nav .nav-list a:hover::after,
.site-nav .nav-list a.active::after{transform:scaleX(1);}
.site-nav .nav-list a:hover,
.site-nav .nav-list a.active{color:var(--c-accent);}
.site-header.scrolled .nav-list a{color:var(--c-text);}
.site-header.scrolled .nav-list a:hover,
.site-header.scrolled .nav-list a.active{color:var(--c-accent);}
.nav-btn{
  margin-left:20px;
  border-color:rgba(255,255,255,.55);
  color:#fff;
}
.nav-btn:hover{border-color:var(--c-accent);color:var(--c-accent);}
.site-header.scrolled .nav-btn{border-color:var(--c-text);color:var(--c-text);}
.site-header.scrolled .nav-btn:hover{border-color:var(--c-accent);color:var(--c-accent);}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  width:44px;height:44px;
  background:transparent;
  border:0;
  cursor:pointer;
  gap:5px;
  padding:0;
}
.nav-toggle span{
  display:block;
  width:22px;height:2px;
  background:#fff;
  transition:transform 250ms ease,opacity 250ms ease;
}
.site-header.scrolled .nav-toggle span{background:var(--c-text);}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.hero{
  position:relative;
  min-height:92vh;
  display:flex;
  align-items:center;
  background-color:var(--c-ink);
  color:#fff;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  opacity:.28;
}
.hero-overlay{
  position:absolute;
  inset:0;
  background:rgba(23,23,19,.84);
}
.hero-content{
  position:relative;
  z-index:2;
  padding-top:96px;
  padding-bottom:96px;
  width:100%;
}
.hero-inner{max-width:780px;}
.hero-kicker{
  display:inline-block;
  font-family:var(--font-sans);
  font-size:.8125rem;
  font-weight:500;
  color:rgba(255,255,255,.55);
  letter-spacing:.12em;
  margin-bottom:24px;
}
.hero-title{
  font-family:var(--font-serif);
  font-size:clamp(2.2rem,5vw,4rem);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-.01em;
  color:#fff;
  margin-bottom:20px;
}
.hero-subtitle{
  font-size:1.0625rem;
  color:rgba(255,255,255,.72);
  margin-bottom:36px;
  max-width:520px;
  line-height:1.6;
}
.hero-actions{
  display:flex;
  align-items:center;
  gap:24px;
  flex-wrap:wrap;
}
.hero-text-link{
  color:rgba(255,255,255,.85);
  font-size:.9375rem;
  text-decoration:underline;
  text-underline-offset:4px;
  text-decoration-color:rgba(255,255,255,.4);
  transition:color var(--ease),text-decoration-color var(--ease);
}
.hero-text-link:hover{
  color:var(--c-accent);
  text-decoration-color:var(--c-accent);
}
.hero-scroll{
  position:absolute;
  bottom:34px;
  left:50%;
  transform:translateX(-50%);
  z-index:3;
  width:1px;
  height:48px;
  background:rgba(255,255,255,.22);
  overflow:hidden;
}
.hero-scroll::before{
  content:'';
  position:absolute;
  left:0;
  top:-50%;
  width:100%;
  height:50%;
  background:var(--c-accent);
  animation:scrollHint 2s ease-in-out infinite;
}
@keyframes scrollHint{
  0%{top:-50%;}
  60%{top:100%;}
  100%{top:100%;}
}
.features-section{background:var(--c-bg);}
.features-cols h2{
  font-size:clamp(1.6rem,2.8vw,2.4rem);
  line-height:1.35;
  margin-bottom:1.2rem;
}
.features-intro{
  font-size:.9375rem;
  color:var(--c-text-2);
  line-height:1.75;
  max-width:460px;
}
.features-intro-muted{color:var(--c-text-3);font-size:.875rem;}
.problem-solution-list{border-top:1px solid var(--c-border);}
.problem-solution-item{
  padding:30px 0;
  border-bottom:1px solid var(--c-border);
}
.problem-block{margin-bottom:16px;position:relative;}
.problem-block::before{
  content:'';
  display:inline-block;
  width:16px;
  height:1px;
  background:var(--c-accent);
  vertical-align:middle;
  margin-right:8px;
}
.ps-label{
  display:block;
  font-family:var(--font-sans);
  font-size:.75rem;
  font-weight:600;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--c-text-3);
  margin-bottom:5px;
}
.problem-block p,
.solution-block p{
  margin:0;
  font-size:.9375rem;
  line-height:1.65;
}
.problem-block p{font-weight:500;}
.solution-block p{color:var(--c-text-2);}
.showcase-section{background:var(--c-card);border-block:1px solid var(--c-border);}
.showcase-figure{
  margin:0;
  position:relative;
  border:1px solid var(--c-border);
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--c-bg);
}
.showcase-figure img{
  width:100%;
  height:100%;
  object-fit:cover;
  aspect-ratio:4/3;
}
.showcase-grid{display:grid;grid-template-columns:5fr 4fr;gap:18px;align-items:start;}
.showcase-figure figcaption{
  font-size:.8125rem;
  color:var(--c-text-2);
  padding:10px 14px;
  border-top:1px solid var(--c-border);
  background:var(--c-bg);
}
.figure-badge{
  position:absolute;
  top:12px;left:12px;
  display:inline-block;
  font-family:var(--font-sans);
  font-size:.75rem;
  color:#fff;
  background:rgba(23,23,19,.72);
  border:1px solid rgba(255,255,255,.3);
  padding:2px 10px;
  border-radius:999px;
  letter-spacing:.06em;
  z-index:2;
}
.showcase-points{margin-top:20px;}
.showcase-points li{
  padding:10px 0;
  border-bottom:1px solid var(--c-border);
  font-size:.9375rem;
  color:var(--c-text-2);
  line-height:1.6;
}
.showcase-points li:last-child{border-bottom:0;}
.showcase-points strong{color:var(--c-text);font-weight:600;}
.stats-section{
  background:var(--c-ink);
  color:#fff;
  padding-block:clamp(3.5rem,6vw,6rem);
}
.stats-row{display:flex;align-items:center;gap:1rem;}
.stat-block{
  flex:1;
  text-align:center;
  padding:1rem .5rem;
}
.stat-number{
  display:block;
  font-family:var(--font-serif);
  font-size:clamp(2rem,4vw,3rem);
  font-weight:300;
  line-height:1.1;
  color:#fff;
  margin-bottom:.4rem;
}
.stat-number small{
  font-size:.55em;
  font-weight:400;
  font-family:var(--font-sans);
  color:var(--c-accent);
  margin-left:2px;
}
.stat-desc{
  display:block;
  font-family:var(--font-sans);
  font-size:.8125rem;
  color:rgba(255,255,255,.6);
}
.stats-brand{
  width:76px;
  height:48px;
  flex-shrink:0;
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:.35;
  filter:grayscale(1);
}
.stats-brand img{max-height:100%;object-fit:contain;}
.pricing-section{background:var(--c-bg);}
.pricing-grid{align-items:stretch;justify-content:center;row-gap:32px;}
.pricing-col{display:flex;}
.pricing-card{
  background:var(--c-card);
  border:1px solid var(--c-border-light);
  padding:34px 30px;
  display:flex;
  flex-direction:column;
  width:100%;
  position:relative;
  transition:box-shadow var(--ease),transform var(--ease);
}
.pricing-card:hover{box-shadow:var(--shadow-2);}
.pricing-card-featured{
  background:var(--c-ink);
  border-color:var(--c-ink);
  color:#fff;
  transform:translateY(-16px);
  padding-block:46px;
}
.pricing-badge{
  position:absolute;
  top:-11px;
  left:50%;
  transform:translateX(-50%);
  border:1px solid var(--c-accent);
  color:var(--c-accent);
  font-size:.75rem;
  font-weight:600;
  padding:2px 12px;
  background:var(--c-bg);
  border-radius:999px;
  white-space:nowrap;
  letter-spacing:.05em;
}
.pricing-card h3{
  font-family:var(--font-sans);
  font-size:1.125rem;
  font-weight:600;
  margin-bottom:6px;
  color:var(--c-text);
}
.pricing-card-featured h3{color:#fff;}
.price-desc{font-size:.875rem;color:var(--c-text-2);margin-bottom:20px;}
.pricing-card-featured .price-desc{color:rgba(255,255,255,.6);}
.price{
  font-family:var(--font-serif);
  font-size:clamp(2rem,3vw,2.6rem);
  font-weight:700;
  color:var(--c-text);
  margin-bottom:24px;
  line-height:1.1;
}
.price-unit{
  font-family:var(--font-sans);
  font-size:.875rem;
  font-weight:400;
  color:var(--c-text-2);
  margin-left:4px;
}
.pricing-card-featured .price,
.pricing-card-featured .price-unit{color:#fff;}
.price-features{
  margin-bottom:28px;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.price-features li{
  font-size:.875rem;
  color:var(--c-text-2);
  display:flex;
  align-items:center;
}
.price-features li::before{
  content:'';
  width:4px;
  height:4px;
  border-radius:50%;
  background:var(--c-accent);
  margin-right:10px;
  flex-shrink:0;
}
.pricing-card-featured .price-features li{color:rgba(255,255,255,.78);}
.pricing-card .btn{margin-top:auto;}
.pricing-card-featured .btn{
  background:var(--c-accent);
  color:#fff;
  border-color:var(--c-accent);
}
.pricing-card-featured .btn:hover{
  background:#fff;
  color:var(--c-ink);
  border-color:#fff;
}
.news-section{background:var(--c-bg);}
.news-list{border-top:1px solid var(--c-border);}
.news-item{border-bottom:1px solid var(--c-border);}
.news-item-link{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:start;
  gap:16px;
  padding:22px 12px;
  transition:background var(--ease);
}
.news-item-link:hover{background:rgba(255,255,255,.55);}
.news-item-tag{
  display:inline-block;
  font-family:var(--font-sans);
  font-size:.75rem;
  color:var(--c-accent);
  border:1px solid rgba(196,123,61,.35);
  border-radius:999px;
  padding:2px 10px;
  white-space:nowrap;
}
.news-item-body h3{
  font-family:var(--font-sans);
  font-size:1.0625rem;
  font-weight:600;
  margin-bottom:6px;
  color:var(--c-text);
  transition:color var(--ease);
}
.news-item-link:hover .news-item-body h3{color:var(--c-accent);}
.news-item-body p{
  font-size:.875rem;
  color:var(--c-text-2);
  margin-bottom:0;
  line-height:1.6;
}
.news-item-meta{
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:8px;
}
.news-item-date{font-size:.8125rem;color:var(--c-text-3);white-space:nowrap;}
.news-item-more{
  font-size:.8125rem;
  color:var(--c-accent);
  opacity:0;
  transition:opacity var(--ease);
}
.news-item-link:hover .news-item-more{opacity:1;}
.news-empty{
  padding:48px 20px;
  text-align:center;
  background:var(--c-card);
  border:1px dashed var(--c-border);
  color:var(--c-text-3);
  font-size:.9375rem;
  border-radius:var(--radius-card);
}
.faq-section{background:var(--c-bg);}
.faq-wrap{
  max-width:760px;
  margin-inline:auto;
}
.accordion{
  margin-left:0;
  background:transparent;
}
.accordion-item{
  border-bottom:1px solid var(--c-border);
}
.accordion-title{
  background:transparent !important;
  border:0 !important;
  color:var(--c-text) !important;
  font-family:var(--font-sans) !important;
  font-size:1.0625rem !important;
  font-weight:600 !important;
  line-height:1.4 !important;
  padding:1.25rem 2.5rem 1.25rem 0 !important;
  position:relative;
  transition:color var(--ease);
}
.accordion-title:hover,
.accordion-title:focus{
  background:transparent !important;
  color:var(--c-accent) !important;
}
.accordion-title::after{
  content:'+';
  position:absolute;
  right:0;
  top:50%;
  transform:translateY(-50%);
  font-size:1.5rem;
  font-weight:300;
  color:var(--c-accent);
  transition:transform var(--ease);
  line-height:1;
}
.accordion-item.is-active > .accordion-title::after{content:'×';}
.accordion-content{
  background:transparent !important;
  border:0 !important;
  border-left:2px solid var(--c-accent);
  padding:.5rem 0 1.5rem 1.25rem !important;
  color:var(--c-text-2);
  font-size:.9375rem;
}
.cta-section{
  background:var(--c-ink);
  color:#fff;
  padding-block:clamp(5rem,8vw,7rem);
  text-align:center;
}
.cta-section h2{
  font-size:clamp(1.8rem,3vw,2.4rem);
  font-weight:600;
  margin-bottom:16px;
}
.cta-section p{
  color:rgba(255,255,255,.65);
  max-width:560px;
  margin-inline:auto;
  margin-bottom:32px;
}
.cta-actions{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:28px;
  flex-wrap:wrap;
}
.cta-link{
  color:rgba(255,255,255,.75);
  font-size:.9375rem;
  text-decoration:underline;
  text-underline-offset:4px;
  text-decoration-color:rgba(255,255,255,.35);
  transition:color var(--ease),text-decoration-color var(--ease);
}
.cta-link:hover{
  color:var(--c-accent);
  text-decoration-color:var(--c-accent);
}
.site-footer{
  background:var(--c-ink);
  color:rgba(255,255,255,.6);
  padding-top:64px;
  border-top:1px solid var(--c-border-dark);
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr;
  gap:48px;
  padding-bottom:40px;
}
.footer-logo{
  font-family:var(--font-serif);
  font-size:1.6rem;
  font-weight:700;
  color:#fff;
}
.footer-desc{
  font-size:.875rem;
  margin-top:12px;
  line-height:1.7;
  color:rgba(255,255,255,.5);
  max-width:320px;
}
.footer-col h4{
  font-family:var(--font-sans);
  font-size:.875rem;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:8px;}
.footer-col a{
  color:rgba(255,255,255,.6);
  font-size:.875rem;
  transition:color var(--ease);
}
.footer-col a:hover{color:var(--c-accent);}
.footer-contact li{
  font-size:.875rem;
  color:rgba(255,255,255,.5);
  margin-bottom:8px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:18px 0 26px;
  text-align:center;
}
.footer-bottom p{
  margin:0;
  font-size:.8125rem;
  color:rgba(255,255,255,.35);
}
.floating-cta{
  position:fixed;
  right:32px;
  bottom:40px;
  z-index:900;
  transition:opacity 250ms ease,transform 250ms ease;
}
.floating-cta.is-hidden{
  opacity:0;
  transform:translateY(16px);
  pointer-events:none;
}
.floating-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:52px;
  padding:0 26px;
  border-radius:999px;
  background:var(--c-ink);
  color:#fff;
  font-size:.9375rem;
  font-weight:500;
  text-decoration:none;
  border:1px solid rgba(255,255,255,.08);
  box-shadow:0 6px 20px rgba(0,0,0,.18);
  transition:background var(--ease),transform var(--ease);
}
.floating-btn:hover{
  background:var(--c-accent);
  color:#fff;
  transform:translateY(-2px);
}
@media(min-width:40em) and (max-width:63.9375em){
  .pricing-card-featured{transform:translateY(-10px);}
  .stats-row{gap:.5rem;}
}
@media(max-width:63.9375em){
  .site-nav .nav-list{gap:20px;}
  .grid-container{padding-left:20px;padding-right:20px;}
}
@media(max-width:39.9375em){
  .grid-container{padding-left:16px;padding-right:16px;}
  .nav-toggle{display:flex;}
  .nav-btn{display:none;}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    background:var(--c-bg);
    border-bottom:1px solid var(--c-border);
    padding:12px 16px 20px;
    box-shadow:0 12px 30px rgba(0,0,0,.06);
  }
  .site-nav.open{display:block;}
  .site-nav .nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .site-nav .nav-list li{border-bottom:1px solid var(--c-border);}
  .site-nav .nav-list li:last-child{border-bottom:0;}
  .site-nav .nav-list a{
    display:block;
    padding:14px 4px;
    color:var(--c-text);
    font-size:1rem;
  }
  .site-nav .nav-list a::after{display:none;}
  .site-nav .nav-list a.active{color:var(--c-accent);}
  .section{padding-block:3.5rem;}
  .hero{min-height:88vh;}
  .hero-content{padding-top:80px;padding-bottom:80px;}
  .hero-title{font-size:clamp(2rem,8vw,2.6rem);}
  .hero-scroll{bottom:24px;height:36px;}
  .problem-solution-item{padding:24px 0;}
  .showcase-grid{grid-template-columns:1fr;}
  .stats-row{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem 1rem;}
  .stats-brand{display:none;}
  .pricing-card-featured{transform:none;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:24px;}
  .floating-cta{
    right:12px;
    left:12px;
    bottom:12px;
  }
  .floating-btn{
    width:100%;
    height:56px;
    border-radius:4px;
    background:var(--c-bg);
    color:var(--c-text);
    border:1px solid var(--c-border);
    box-shadow:0 -1px 12px rgba(0,0,0,.06);
  }
  .floating-btn:hover{
    background:var(--c-accent);
    color:#fff;
  }
  .news-item-link{grid-template-columns:1fr;gap:10px;}
  .news-item-meta{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
  }
}

/* roulang page: category1 */
:root {
  --color-primary: #171713;
  --color-secondary: #2a2a26;
  --color-accent: #c47b3d;
  --color-bg: #f7f5f1;
  --color-card: #ffffff;
  --color-text: #26261f;
  --color-text-sub: #6e6960;
  --color-text-muted: #9c968a;
  --color-line: #e7e2da;
  --color-line-dark: #3a3a34;
  --category-hero-bg: #f0ede6;
  --radius-btn: 2px;
  --radius-card: 4px;
  --radius-image: 4px;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-hover: 0 4px 12px rgba(0,0,0,0.06);
  --container-width: 1200px;
  --space-section: clamp(4.5rem, 8vw, 8rem);
  --nav-height: 72px;
  --font-serif: "Noto Serif SC", "Songti SC", SimSun, serif;
  --font-sans: "Noto Sans SC", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--color-accent); }
a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

button { font-family: inherit; }

.grid-container { max-width: var(--container-width); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(247,245,241,.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
  transition: height .2s ease, box-shadow .2s ease;
}
.site-header.scrolled {
  height: 56px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.4rem;
  line-height: 1.2;
  color: var(--color-primary);
  letter-spacing: .02em;
}
.logo .logo-dot { color: var(--color-accent); }
.site-nav .nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 28px;
}
.site-nav .nav-list a {
  position: relative;
  display: inline-block;
  padding: 8px 0;
  font-size: .9375rem;
  font-weight: 400;
  color: var(--color-text);
}
.site-nav .nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform .2s ease;
}
.site-nav .nav-list a:hover::after,
.site-nav .nav-list a.active::after {
  transform: scaleX(1);
}
.site-nav .nav-list a.active {
  font-weight: 500;
  color: var(--color-primary);
}
.nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 20px;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
  border-radius: var(--radius-btn);
  font-size: .9375rem;
  font-weight: 500;
  transition: all .2s ease;
}
.nav-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: transparent;
}
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: none;
  border: 0;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform .2s ease;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  font-size: .95rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .2s ease;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}
.btn-outline-light {
  background: transparent;
  border-color: rgba(255,255,255,.8);
  color: #fff;
}
.btn-outline-light:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: transparent;
}
.btn-text-link {
  display: inline-flex;
  align-items: center;
  font-size: .95rem;
  font-weight: 500;
  color: var(--color-primary);
  text-underline-offset: 4px;
  text-decoration: underline;
}
.btn-text-link:hover { color: var(--color-accent); }
.btn-text-light {
  color: rgba(255,255,255,.85);
  text-decoration: underline;
}
.btn-text-light:hover { color: var(--color-accent); }

/* ---------- Category Hero ---------- */
.category-hero {
  background: var(--category-hero-bg);
  padding: clamp(3.5rem, 7vw, 6rem) 0;
  border-bottom: 1px solid var(--color-line);
}
.page-tag {
  display: inline-block;
  font-size: .8125rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: .12em;
  margin-bottom: 1rem;
}
.product-h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.1rem, 4.5vw, 3.6rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--color-primary);
  margin: 0 0 .6em;
}
.page-intro {
  font-size: 1.0625rem;
  color: var(--color-text-sub);
  max-width: 560px;
  margin-bottom: 2rem;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.hero-figure {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-image);
}
.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(23,23,19,.6);
  color: #fff;
  font-size: .75rem;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: .08em;
}

/* ---------- Section base ---------- */
.section-block {
  padding: var(--space-section) 0;
}
.section-head {
  margin-bottom: 2.5rem;
}
.section-index {
  display: block;
  font-family: var(--font-serif);
  font-size: .9375rem;
  color: var(--color-accent);
  margin-bottom: .5rem;
}
.section-head h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  line-height: 1.3;
  color: var(--color-primary);
  margin: 0 0 .5rem;
}
.section-head > p {
  color: var(--color-text-sub);
  max-width: 640px;
  margin-bottom: 0;
}

/* ---------- Compare block ---------- */
.compare-block {
  background: var(--color-card);
  border-bottom: 1px solid var(--color-line);
}
.compare-intro h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
  line-height: 1.3;
  color: var(--color-primary);
  margin: 0 0 1rem;
}
.compare-intro p {
  color: var(--color-text-sub);
  font-size: .9375rem;
  max-width: 50ch;
}
.pair-item {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-line);
}
.pair-item:last-child { border-bottom: 0; }
.pair-question {
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: .35rem;
}
.pair-answer {
  color: var(--color-text-sub);
  font-size: .9375rem;
}

/* ---------- Guide list ---------- */
.guide-list-block { background: var(--color-bg); }
.guide-list { border-top: 1px solid var(--color-line); }
.guide-item {
  display: flex;
  gap: 24px;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--color-line);
  transition: background .2s ease;
}
.guide-item:hover { background: rgba(196,123,61,.04); }
.guide-num {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-accent);
  line-height: 1.4;
  min-width: 44px;
}
.guide-content h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--color-primary);
  margin: 0 0 .35rem;
  transition: color .2s ease;
}
.guide-item:hover .guide-content h3 { color: var(--color-accent); }
.guide-content p {
  color: var(--color-text-sub);
  font-size: .9375rem;
  margin-bottom: .75rem;
  max-width: 72ch;
}
.guide-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: .8125rem;
  color: var(--color-text-muted);
}
.guide-meta .guide-cat {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid var(--color-line);
  color: var(--color-text-sub);
}
.guide-meta a {
  color: var(--color-text-sub);
  border-bottom: 1px solid var(--color-line);
  line-height: 1.4;
}
.guide-meta a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ---------- Process ---------- */
.process-block { background: var(--color-card); }
.process-step {
  height: 100%;
  border-left: 2px solid var(--color-line);
  padding: 1.25rem 0 1.25rem 1.5rem;
  transition: border-color .2s ease;
}
.process-step:hover { border-color: var(--color-accent); }
.process-step .step-num {
  display: block;
  font-family: var(--font-serif);
  font-size: .9375rem;
  color: var(--color-accent);
  margin-bottom: .35rem;
}
.process-step h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.0625rem;
  margin: 0 0 .5rem;
  color: var(--color-primary);
}
.process-step p {
  color: var(--color-text-sub);
  font-size: .9375rem;
  margin-bottom: 0;
  max-width: 36ch;
}

/* ---------- Stats band ---------- */
.stats-band {
  background: var(--color-primary);
  padding: clamp(3.5rem, 6vw, 5rem) 0;
  border-top: 1px solid var(--color-line-dark);
  border-bottom: 1px solid var(--color-line-dark);
  color: #fff;
}
.logo-placeholder {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed rgba(255,255,255,.25);
  border-radius: var(--radius-card);
  color: rgba(255,255,255,.3);
  font-size: .8125rem;
  letter-spacing: .06em;
}
.stat-item {
  text-align: center;
  padding: 1rem .5rem;
}
.stat-num {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 200;
  line-height: 1.1;
  color: #fff;
}
.stat-label {
  font-size: .875rem;
  color: rgba(255,255,255,.65);
  margin-top: .5rem;
}

/* ---------- FAQ ---------- */
.faq-block { background: var(--color-bg); }
.narrow-container { max-width: 760px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--color-line);
}
.faq-item h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.0625rem;
  line-height: 1.5;
  margin: 0;
  padding: 1.1rem 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--color-primary);
}
.faq-item h3::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--color-text-muted);
  transition: transform .2s ease;
  flex-shrink: 0;
}
.faq-item.active h3::after {
  transform: rotate(45deg);
  color: var(--color-accent);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-answer p {
  margin: 0;
  padding: 0 0 1.1rem;
  border-left: 2px solid var(--color-accent);
  padding-left: 1rem;
  color: var(--color-text-sub);
  font-size: .9375rem;
  max-width: 60ch;
}

/* ---------- Category nav ---------- */
.category-nav-section {
  background: var(--color-card);
  border-top: 1px solid var(--color-line);
}
.category-nav-grid { row-gap: 24px; }
.category-nav-card {
  height: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  transition: box-shadow .2s ease, border-color .2s ease;
}
.category-nav-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: #d6d0c6;
}
.category-nav-card.current {
  border-color: var(--color-accent);
}
.category-nav-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 .5rem;
  color: var(--color-primary);
}
.category-nav-card p {
  font-size: .875rem;
  color: var(--color-text-sub);
  margin-bottom: 1rem;
}
.category-nav-card .link-more {
  display: inline-block;
  font-size: .875rem;
  font-weight: 500;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 1px;
}

/* ---------- Final CTA ---------- */
.final-cta {
  background: var(--color-primary);
  padding: clamp(4rem, 7vw, 6rem) 0;
  text-align: center;
  color: #fff;
}
.final-cta h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  color: #fff;
  margin: 0 0 .75rem;
}
.final-cta p {
  color: rgba(255,255,255,.7);
  max-width: 560px;
  margin: 0 auto 2rem;
  font-size: .9375rem;
}
.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
}
.final-cta .btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.final-cta .btn-primary:hover {
  background: #fff;
  border-color: #fff;
  color: var(--color-primary);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,.75);
  padding: 3.5rem 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2rem;
}
.footer-logo {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.4rem;
  color: #fff;
}
.footer-desc {
  color: rgba(255,255,255,.55);
  font-size: .875rem;
  line-height: 1.7;
  max-width: 36ch;
  margin-top: .75rem;
}
.footer-col h4 {
  color: #fff;
  font-size: .9375rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-col li {
  margin-bottom: .6rem;
  font-size: .875rem;
}
.footer-col a {
  color: rgba(255,255,255,.65);
  transition: color .2s ease;
}
.footer-col a:hover { color: var(--color-accent); }
.footer-bottom {
  border-top: 1px solid var(--color-line-dark);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .8125rem;
  color: rgba(255,255,255,.4);
}

/* ---------- Responsive ---------- */
@media (max-width: 1023.98px) {
  .category-hero .large-6 + .large-6 {
    margin-top: 2.5rem;
  }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-desc { max-width: none; }
}

@media (max-width: 767.98px) {
  .site-header {
    height: 56px;
  }
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
  }
  .site-nav.open { max-height: 460px; }
  .site-nav .nav-list {
    flex-direction: column;
    gap: 0;
    padding: 1rem 0;
  }
  .site-nav .nav-list li {
    width: 100%;
    border-bottom: 1px solid var(--color-line);
  }
  .site-nav .nav-list li:last-child { border-bottom: 0; }
  .site-nav .nav-list a {
    display: block;
    padding: 14px 0;
  }
  .site-nav .nav-list a::after { display: none; }
  .nav-btn {
    width: 100%;
    margin-top: 16px;
  }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
}

@media (max-width: 520px) {
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-actions .btn { width: 100%; }
  .guide-item { gap: 16px; }
  .guide-num { min-width: 34px; }
  .guide-meta { gap: 10px; }
  .process-step { border-left-width: 2px; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .final-cta .btn-text-light { text-align: center; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
}

/* roulang page: article */
:root {
  --primary: #171713;
  --primary-light: #2a2a26;
  --primary-dark: #1f1f1b;
  --accent: #c47b3d;
  --bg: #f7f5f1;
  --card-bg: #ffffff;
  --text: #26261f;
  --text-secondary: #6e6960;
  --text-muted: #9c968a;
  --border: #e7e2da;
  --border-dark: #3a3a34;
  --font-serif: 'Noto Serif SC', 'Songti SC', 'STSong', Georgia, serif;
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --radius-sm: 2px;
  --radius-md: 4px;
  --transition: 200ms ease;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.06);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--text);
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
a:hover {
  color: var(--accent);
}
ul, ol {
  padding-left: 1.4em;
}
button, input, select, textarea {
  font-family: inherit;
}
.grid-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
::selection {
  background: var(--accent);
  color: #fff;
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 245, 241, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  height: 72px;
  display: flex;
  align-items: center;
  transition: height var(--transition), background var(--transition), border-color var(--transition);
}
.site-header.scrolled {
  height: 56px;
  background: rgba(247, 245, 241, 0.97);
  border-bottom-color: var(--border);
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: baseline;
  line-height: 1;
}
.logo:hover {
  color: var(--text);
}
.logo-dot {
  color: var(--accent);
}
.site-nav {
  display: flex;
  align-items: center;
}
.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0;
  padding: 0;
}
.nav-list a {
  font-size: 0.9375rem;
  color: var(--text);
  font-weight: 400;
  position: relative;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}
.nav-list a:hover,
.nav-list a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.nav-btn {
  flex-shrink: 0;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 10px 24px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--primary);
  background: var(--primary);
  color: #fff;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.nav-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 10px;
  cursor: pointer;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: transform var(--transition), opacity var(--transition);
  border-radius: 1px;
}
.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 32px 0 16px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.breadcrumb a {
  color: var(--text-secondary);
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .sep {
  color: var(--text-muted);
}
.breadcrumb .current {
  color: var(--text);
  font-weight: 500;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== Article Page ===== */
.article-page {
  padding: 0 0 clamp(4rem, 8vw, 6rem);
  min-height: 60vh;
}
.article-wrapper {
  max-width: 860px;
  margin: 0 auto;
}
.article-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: clamp(28px, 5vw, 56px);
  margin-top: 8px;
  box-shadow: var(--shadow-sm);
}
.article-header {
  margin-bottom: 32px;
}
.article-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.2vw, 3rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0 0 16px;
  word-break: break-word;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.article-meta i {
  color: var(--accent);
  margin-right: 5px;
}
.meta-author {
  color: var(--text-muted);
}

/* ===== Article Body ===== */
.article-body {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
}
.article-body > p:first-child {
  font-size: 1.125rem;
  color: var(--text-secondary);
}
.article-body p {
  margin: 1.5em 0;
}
.article-body h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1.3;
  margin: 2.2em 0 0.6em;
  padding-top: 0.5em;
  border-top: 1px solid var(--border);
}
.article-body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 1.8em 0 0.5em;
}
.article-body ul,
.article-body ol {
  margin: 1.2em 0;
}
.article-body li {
  margin: 0.4em 0;
}
.article-body blockquote {
  margin: 1.8em 0;
  padding: 16px 24px;
  border-left: 2px solid var(--accent);
  background: var(--bg);
  color: var(--text-secondary);
  font-style: normal;
}
.article-body blockquote p {
  margin: 0.5em 0;
}
.article-body pre {
  background: var(--primary);
  color: #f0ede6;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  line-height: 1.6;
  font-size: 0.875rem;
}
.article-body code {
  background: #ece8e1;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.875em;
}
.article-body pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
}
.article-body th,
.article-body td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  font-size: 0.9375rem;
  text-align: left;
}
.article-body th {
  background: var(--bg);
  font-weight: 600;
}
.article-body img {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  margin: 1.6em auto;
  max-width: 100%;
}
.article-body a {
  color: var(--accent);
  border-bottom: 1px solid rgba(196, 123, 61, 0.3);
}
.article-body a:hover {
  border-bottom-color: var(--accent);
}

/* ===== Empty State ===== */
.article-empty {
  padding: 64px 0;
  text-align: center;
}
.article-empty p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ===== Tags ===== */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.tags-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}
.tag {
  display: inline-block;
  padding: 4px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  transition: border-color var(--transition), color var(--transition);
}
.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== Related Posts ===== */
.related-posts {
  margin-top: 48px;
}
.related-posts h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 24px;
  position: relative;
  padding-left: 18px;
}
.related-posts h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10%;
  width: 3px;
  height: 80%;
  background: var(--accent);
}
.related-posts .cell {
  margin-bottom: 20px;
}
.related-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.related-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}
.related-thumb {
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.related-item:hover .related-thumb img {
  transform: scale(1.03);
}
.related-content {
  padding: 20px 20px 24px;
}
.related-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 8px;
}
.related-content h3 a {
  color: var(--text);
}
.related-content h3 a:hover {
  color: var(--accent);
}
.related-content p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ===== Back Link ===== */
.back-link {
  margin-top: 40px;
  text-align: center;
}
.back-link a {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color var(--transition);
}
.back-link a:hover {
  color: var(--accent);
}

/* ===== CTA ===== */
.page-cta {
  background: var(--primary);
  padding: 56px 0;
  text-align: center;
}
.page-cta h2 {
  font-family: var(--font-serif);
  color: #fff;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 600;
  margin: 0 0 12px;
}
.page-cta p {
  color: rgba(247, 245, 241, 0.65);
  font-size: 0.9375rem;
  margin: 0 0 28px;
}
.btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
}
.btn-outline-light:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-outline-dark {
  background: transparent;
  color: var(--text);
  border-color: var(--text);
}
.btn-outline-dark:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary);
  color: rgba(247, 245, 241, 0.7);
  padding: 64px 0 0;
  border-top: 1px solid var(--border-dark);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  display: inline-block;
  margin-bottom: 12px;
}
.footer-logo:hover {
  color: var(--accent);
}
.footer-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(247, 245, 241, 0.55);
  margin: 0;
  max-width: 280px;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 18px;
}
.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-col li {
  margin-bottom: 10px;
}
.footer-col a {
  color: rgba(247, 245, 241, 0.6);
  font-size: 0.875rem;
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-contact {
  color: rgba(247, 245, 241, 0.6);
  font-size: 0.875rem;
}
.footer-contact li {
  line-height: 1.6;
}
.footer-bottom {
  border-top: 1px solid var(--border-dark);
  padding: 20px 0;
  text-align: center;
  font-size: 0.8125rem;
  color: rgba(247, 245, 241, 0.4);
}
.footer-bottom p {
  margin: 0;
}

/* ===== Foundation Overrides ===== */
a {
  text-decoration: none;
}
.button {
  border-radius: var(--radius-sm);
}
.grid-container {
  max-width: 1200px;
}

/* ===== Responsive ===== */
@media (max-width: 639px) {
  .site-header {
    height: 60px;
  }
  .site-header.scrolled {
    height: 52px;
  }
  .nav-btn {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .site-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s ease;
    z-index: 99;
  }
  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }
  .nav-list li {
    width: 100%;
  }
  .nav-list a {
    display: block;
    color: var(--text);
    font-size: 1.0625rem;
    padding: 13px 0;
    border-bottom: 1px solid var(--border);
  }
  .nav-list a.active {
    color: var(--accent);
  }
  .breadcrumb {
    padding-top: 24px;
    font-size: 0.75rem;
  }
  .article-card {
    padding: 24px 20px;
  }
  .article-meta {
    gap: 10px;
    flex-direction: column;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .page-cta .btn-group {
    flex-direction: column;
  }
  .page-cta .btn {
    width: 100%;
  }
  .related-posts .cell {
    margin-bottom: 16px;
  }
}
@media (min-width: 640px) and (max-width: 1023px) {
  .nav-list {
    gap: 18px;
  }
  .nav-list a {
    font-size: 0.875rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-desc {
    max-width: none;
  }
}

/* roulang page: category3 */
:root {
  --color-primary: #171713;
  --color-primary-light: #2a2a26;
  --color-panel-dark: #1f1f1b;
  --color-accent: #c47b3d;
  --color-bg: #f7f5f1;
  --color-card: #ffffff;
  --color-text: #26261f;
  --color-text-secondary: #6e6960;
  --color-text-weak: #9c968a;
  --color-border: #e7e2da;
  --color-border-dark: #3a3a34;
  --radius-btn: 2px;
  --radius-card: 4px;
  --radius-tag: 999px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.06);
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", Georgia, serif;
  --font-sans: "Noto Sans SC", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-max: 1200px;
  --content-max: 760px;
  --space-section: clamp(4.5rem, 8vw, 8rem);
  --transition-base: all 0.2s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-base);
}

img {
  max-width: 100%;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea {
  font-family: inherit;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-serif);
  line-height: 1.3;
  color: var(--color-text);
}

.grid-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

@media screen and (max-width: 39.9375em) {
  .grid-container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 72px;
  background: rgba(23, 23, 19, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: height 0.2s ease, background 0.2s ease;
}

.site-header.scrolled {
  height: 56px;
  background: rgba(247, 245, 241, 0.92);
  border-bottom-color: var(--color-border);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  transition: height 0.2s ease;
}

.site-header.scrolled .header-row {
  height: 56px;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #ffffff;
  display: inline-flex;
  align-items: baseline;
  position: relative;
}

.logo-dot {
  color: var(--color-accent);
  font-weight: 700;
}

.site-header.scrolled .logo {
  color: var(--color-primary);
}

.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.site-nav .nav-list a {
  font-size: 0.9375rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.85);
  padding: 6px 2px;
  position: relative;
  letter-spacing: 0.02em;
}

.site-nav .nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s ease;
}

.site-nav .nav-list a:hover::after,
.site-nav .nav-list a.active::after {
  transform: scaleX(1);
}

.site-nav .nav-list a:hover {
  color: #ffffff;
}

.site-nav .nav-list a.active {
  color: #ffffff;
  font-weight: 500;
}

.site-header.scrolled .site-nav .nav-list a {
  color: var(--color-text);
}

.site-header.scrolled .site-nav .nav-list a:hover,
.site-header.scrolled .site-nav .nav-list a.active {
  color: var(--color-accent);
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 22px;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-btn);
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #ffffff;
  transition: var(--transition-base);
  white-space: nowrap;
}

.nav-btn:hover {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: #ffffff;
}

.site-header.scrolled .nav-btn {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.site-header.scrolled .nav-btn:hover {
  background: var(--color-primary);
  color: #ffffff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 24px;
  background: #ffffff;
  transition: var(--transition-base);
}

.site-header.scrolled .nav-toggle span {
  background: var(--color-primary);
}

@media screen and (max-width: 63.9375em) {
  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
    border-bottom: 1px solid transparent;
  }

  .site-nav.open {
    max-height: 320px;
    border-bottom-color: var(--color-border);
  }

  .site-header.scrolled .site-nav {
    top: 56px;
  }

  .site-nav .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 0;
  }

  .site-nav .nav-list li {
    width: 100%;
  }

  .site-nav .nav-list a {
    display: block;
    padding: 14px 0;
    font-size: 1rem;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav .nav-list a:last-child {
    border-bottom: none;
  }

  .site-nav .nav-list a::after {
    display: none;
  }

  .site-nav .nav-list a.active {
    color: var(--color-accent);
  }

  .nav-btn {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }
}

/* Hero */
.category-hero {
  position: relative;
  background-color: var(--color-primary);
  background-image: linear-gradient(135deg, rgba(23, 23, 19, 0.92) 0%, rgba(23, 23, 19, 0.78) 100%), url("/assets/images/backpic/back-3.png");
  background-size: cover;
  background-position: center;
  min-height: 72vh;
  padding: 160px 0 60px;
  display: flex;
  align-items: center;
  color: #ffffff;
}

.category-hero .hero-tag {
  display: inline-block;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.72);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
}

.category-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  max-width: 660px;
}

.category-hero .hero-sub {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.75);
  max-width: 420px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 26px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-btn);
  transition: var(--transition-base);
  white-space: nowrap;
}

.btn-primary-dark {
  background: var(--color-primary);
  color: #ffffff;
  border: 1px solid var(--color-primary);
}

.btn-primary-dark:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

.btn-outline-light {
  background: transparent;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.btn-outline-light:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-primary-accent {
  background: var(--color-accent);
  color: #ffffff;
  border: 1px solid var(--color-accent);
}

.btn-primary-accent:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline-dark {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-text);
}

.btn-outline-dark:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.hero-visual {
  margin-top: 40px;
}

.hero-visual .cover-wrap {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-panel-dark);
}

.hero-visual .cover-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cover-wrap .corner-label {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(23, 23, 19, 0.82);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.75rem;
  padding: 3px 12px;
  border-radius: var(--radius-tag);
  letter-spacing: 0.05em;
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(4px);
}

.hero-scroll {
  margin-top: 44px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8125rem;
}

.hero-scroll .line {
  display: block;
  width: 1px;
  height: 48px;
  background: rgba(255, 255, 255, 0.35);
  position: relative;
  overflow: hidden;
}

.hero-scroll .line::after {
  content: "";
  position: absolute;
  left: 0;
  top: -100%;
  width: 100%;
  height: 100%;
  background: var(--color-accent);
  animation: lineDown 1.8s ease-in-out infinite;
}

@keyframes lineDown {
  0% { top: -100%; }
  60% { top: 0%; }
  100% { top: 100%; }
}

/* Section spacing */
.section {
  padding: var(--space-section) 0;
}

.section-head {
  margin-bottom: 44px;
}

.section-head .pre {
  display: inline-block;
  font-size: 0.8125rem;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: 12px;
}

.section-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
  position: relative;
  padding-top: 20px;
}

.section-head h2::before {
  content: "";
  display: block;
  width: 36px;
  height: 2px;
  background: var(--color-accent);
  margin-bottom: 12px;
}

.section-head .desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: 420px;
  margin-top: 10px;
}

/* Feature split */
.feature-split {
  background: var(--color-bg);
}

.feature-left {
  padding-right: 40px;
}

.feature-left h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-text);
  margin-bottom: 24px;
}

.feature-left .lead {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  line-height: 1.8;
}

.feature-left .feature-img {
  margin-top: 32px;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  position: relative;
  aspect-ratio: 4 / 3;
}

.feature-left .feature-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pair-list {
  border-top: 1px solid var(--color-border);
}

.pair-item {
  padding: 26px 0;
  border-bottom: 1px solid var(--color-border);
}

.pair-item .q {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--color-text-weak);
  font-weight: 400;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pair-item .q::before {
  content: "Q";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-tag);
  font-size: 0.6875rem;
  color: var(--color-text-weak);
  flex-shrink: 0;
}

.pair-item .a {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.65;
  margin-top: 8px;
  padding-left: 30px;
}

/* Activity index list */
.activity-index {
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.index-list {
  border-top: 1px solid var(--color-border);
}

.index-item {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-border);
  transition: background 0.2s ease;
}

.index-item:hover {
  background: rgba(247, 245, 241, 0.6);
}

.index-item .num {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-weak);
  min-width: 48px;
  letter-spacing: 0.05em;
}

.index-item .body {
  flex: 1;
  min-width: 0;
}

.index-item .body h3 {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
  transition: color 0.2s ease;
}

.index-item:hover .body h3 {
  color: var(--color-accent);
}

.index-item .body p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 72ch;
}

.index-item .meta {
  font-size: 0.8125rem;
  color: var(--color-text-weak);
  white-space: nowrap;
}

.index-item .link-more {
  font-size: 0.8125rem;
  color: var(--color-accent);
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.index-item .link-more:hover {
  border-bottom-color: var(--color-accent);
}

@media screen and (max-width: 39.9375em) {
  .index-item {
    flex-wrap: wrap;
    gap: 10px;
    padding: 24px 0;
  }

  .index-item .num {
    min-width: 36px;
    font-size: 1rem;
  }

  .index-item .meta {
    white-space: normal;
    font-size: 0.75rem;
    margin-left: 46px;
  }

  .index-item .link-more {
    margin-left: 46px;
  }
}

/* Process steps */
.process-steps {
  background: var(--color-bg);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 40px;
}

.step-card {
  position: relative;
  padding: 28px 20px 24px 20px;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  border-radius: var(--radius-card);
  transition: var(--transition-base);
}

.step-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.step-card .step-num {
  font-family: var(--font-serif);
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 600;
  display: block;
  margin-bottom: 14px;
  letter-spacing: 0.06em;
}

.step-card h3 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}

.step-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

@media screen and (max-width: 63.9375em) {
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media screen and (max-width: 39.9375em) {
  .steps-grid {
    grid-template-columns: 1fr;
  }
}

/* Data band */
.data-band {
  background: var(--color-primary);
  padding: clamp(3.5rem, 6vw, 5.5rem) 0;
  color: #ffffff;
}

.data-band .grid-x {
  align-items: center;
}

.data-item {
  text-align: center;
  padding: 20px 10px;
}

.data-item .data-num {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  color: #ffffff;
  line-height: 1.2;
}

.data-item .data-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 8px;
  letter-spacing: 0.02em;
}

.data-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 10px;
}

.data-logo .logo-slot {
  width: 140px;
  height: 48px;
  border: 1px dashed rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.05em;
}

@media screen and (max-width: 63.9375em) {
  .data-logo {
    display: none;
  }
}

/* FAQ */
.faq-section {
  background: var(--color-bg);
}

.faq-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.faq-inner .section-head {
  text-align: center;
}

.faq-inner .section-head h2::before {
  margin-left: auto;
  margin-right: auto;
}

.faq-inner .section-head .desc {
  margin-left: auto;
  margin-right: auto;
}

.accordion {
  background: transparent;
  border: none;
}

.accordion-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-border);
}

.accordion-title {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  padding: 22px 40px 22px 0;
  position: relative;
  display: block;
  background: transparent;
  border: none;
}

.accordion-title:hover,
.accordion-title:focus {
  background: transparent;
  color: var(--color-accent);
}

.accordion-title::before,
.accordion-title::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.2s ease;
}

.accordion-title::after {
  transform: translateY(-50%) rotate(90deg);
}

.accordion-title:hover::before,
.accordion-title:hover::after {
  background: var(--color-accent);
}

.accordion-item.is-active .accordion-title {
  color: var(--color-accent);
}

.accordion-item.is-active .accordion-title::after {
  transform: translateY(-50%) rotate(90deg);
  opacity: 0;
}

.accordion-content {
  background: transparent;
  border: none;
  padding: 0 40px 24px 0;
}

.accordion-content p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 60ch;
  border-left: 2px solid var(--color-accent);
  padding-left: 20px;
  margin-bottom: 0;
}

/* Category nav */
.cat-nav-section {
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: clamp(3.5rem, 6vw, 5rem) 0;
}

.cat-nav-section .section-head {
  text-align: center;
}

.cat-nav-section .section-head h2::before {
  margin-left: auto;
  margin-right: auto;
}

.cat-nav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.cat-nav-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px 22px;
  text-align: center;
  transition: var(--transition-base);
  background: var(--color-bg);
}

.cat-nav-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.cat-nav-card h3 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.cat-nav-card p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.cat-nav-card .cat-link {
  font-size: 0.8125rem;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.cat-nav-card .cat-link:hover {
  border-bottom-color: var(--color-accent);
}

.cat-nav-card.current {
  border-color: var(--color-accent);
  background: var(--color-primary);
}

.cat-nav-card.current h3,
.cat-nav-card.current p {
  color: #ffffff;
}

.cat-nav-card.current .cat-link {
  color: rgba(255, 255, 255, 0.85);
}

.cat-nav-card.current .cat-link:hover {
  border-bottom-color: rgba(255, 255, 255, 0.85);
}

@media screen and (max-width: 63.9375em) {
  .cat-nav-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media screen and (max-width: 39.9375em) {
  .cat-nav-grid {
    grid-template-columns: 1fr;
  }
}

/* CTA band */
.cta-band {
  background: var(--color-primary);
  padding: clamp(5rem, 8vw, 7rem) 0;
  text-align: center;
  color: #ffffff;
}

.cta-band h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 600;
  color: #ffffff;
  line-height: 1.35;
  margin-bottom: 16px;
}

.cta-band p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.65);
  max-width: 520px;
  margin: 0 auto 32px;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.cta-actions .text-link {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  padding-bottom: 2px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.cta-actions .text-link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* Footer */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
  border-top: 1px solid var(--color-border-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 44px;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 700;
  color: #ffffff;
  display: inline-flex;
  align-items: baseline;
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.75;
  max-width: 320px;
  margin-top: 12px;
}

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 18px;
}

.footer-col ul {
  margin: 0;
  padding: 0;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.2s ease;
}

.footer-col ul li a:hover {
  color: var(--color-accent);
}

.footer-contact li {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid var(--color-border-dark);
  padding: 22px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
  margin: 0;
}

@media screen and (max-width: 63.9375em) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media screen and (max-width: 39.9375em) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* Floating CTA */
.float-cta {
  position: fixed;
  bottom: 40px;
  right: 32px;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  background: var(--color-primary);
  color: #ffffff;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-tag);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-hover);
  transition: var(--transition-base);
  letter-spacing: 0.02em;
}

.float-cta:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-2px);
  color: #ffffff;
}

@media screen and (max-width: 39.9375em) {
  .float-cta {
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 56px;
    border-radius: 0;
    border: none;
    border-top: 1px solid var(--color-border);
    background: rgba(247, 245, 241, 0.95);
    backdrop-filter: blur(10px);
    color: var(--color-text);
    box-shadow: none;
  }

  .float-cta:hover {
    background: var(--color-primary);
    transform: none;
    color: #ffffff;
  }

  body {
    padding-bottom: 56px;
  }
}

/* Focus accessibility */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Table override for Foundation */
table {
  background: transparent;
  border: 1px solid var(--color-border);
}

table thead th {
  background: var(--color-bg);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

table tbody td {
  border-bottom: 1px solid var(--color-border);
}

@media screen and (max-width: 39.9375em) {
  table.stack thead {
    display: none;
  }

  table.stack tbody tr {
    display: block;
    border: 1px solid var(--color-border);
    margin-bottom: 16px;
  }

  table.stack tbody td {
    display: block;
    text-align: right;
  }

  table.stack tbody td::before {
    content: attr(data-label);
    float: left;
    font-weight: 600;
    color: var(--color-text-secondary);
  }
}

/* roulang page: category2 */
:root {
      --color-ink: #171713;
      --color-ink-2: #2a2a26;
      --color-accent: #c47b3d;
      --color-accent-dark: #a8612d;
      --color-bg: #f7f5f1;
      --color-bg-light: #f0ede6;
      --color-card: #ffffff;
      --color-text: #26261f;
      --color-text-secondary: #6e6960;
      --color-text-muted: #9c968a;
      --color-border: #e7e2da;
      --color-border-dark: #3a3a34;
      --radius-btn: 2px;
      --radius-card: 4px;
      --shadow-1: 0 1px 3px rgba(0, 0, 0, 0.04);
      --shadow-2: 0 4px 12px rgba(0, 0, 0, 0.06);
      --space-section: clamp(4.5rem, 8vw, 8rem);
      --header-h: 72px;
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'Noto Sans SC', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      font-size: 16px;
      line-height: 1.75;
      color: var(--color-text);
      background: var(--color-bg);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    img {
      max-width: 100%;
      display: block;
      height: auto;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    ul,
    ol {
      list-style: none;
    }

    .grid-container {
      max-width: 1200px;
    }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 44px;
      padding: 0 24px;
      font-size: 0.95rem;
      font-weight: 500;
      border-radius: var(--radius-btn);
      line-height: 1;
      white-space: nowrap;
      transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
      border: 1px solid transparent;
    }

    .btn-primary {
      background: var(--color-ink);
      color: #fff;
      border-color: var(--color-ink);
    }

    .btn-primary:hover {
      background: var(--color-accent);
      border-color: var(--color-accent);
      color: #fff;
    }

    .btn-outline-light {
      background: transparent;
      color: var(--color-ink);
      border-color: var(--color-ink);
    }

    .btn-outline-light:hover {
      border-color: var(--color-accent);
      color: var(--color-accent);
      background: transparent;
    }

    .btn:focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 2px;
    }

    /* ===== 导航 ===== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      height: var(--header-h);
      background: rgba(247, 245, 241, 0.86);
      -webkit-backdrop-filter: blur(12px);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(231, 226, 218, 0.9);
      transition: height 0.2s ease, background 0.2s ease;
    }

    .site-header.scrolled {
      height: 56px;
      background: rgba(247, 245, 241, 0.96);
    }

    .header-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: var(--header-h);
      transition: height 0.2s ease;
    }

    .site-header.scrolled .header-row {
      height: 56px;
    }

    .logo {
      font-family: 'Noto Serif SC', serif;
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--color-ink);
      letter-spacing: -0.01em;
      display: inline-flex;
      align-items: baseline;
    }

    .logo-dot {
      color: var(--color-accent);
    }

    .site-nav .nav-list {
      display: flex;
      gap: 28px;
      align-items: center;
    }

    .site-nav a {
      font-size: 0.9375rem;
      font-weight: 400;
      color: var(--color-text-secondary);
      padding: 6px 0;
      position: relative;
      transition: color 0.2s ease;
    }

    .site-nav a:hover {
      color: var(--color-ink);
    }

    .site-nav a.active {
      color: var(--color-ink);
      font-weight: 500;
    }

    .site-nav a.active::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 100%;
      height: 2px;
      background: var(--color-accent);
    }

    .nav-btn {
      flex-shrink: 0;
      margin-left: 8px;
    }

    .nav-toggle {
      display: none;
      width: 40px;
      height: 40px;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
    }

    .nav-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--color-ink);
      transition: transform 0.25s ease, opacity 0.25s ease;
    }

    .nav-toggle.open span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.open span:nth-child(2) {
      opacity: 0;
    }

    .nav-toggle.open span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    /* ===== 页头 ===== */
    .page-hero {
      background: var(--color-bg-light);
      padding: calc(var(--header-h) + 76px) 0 68px;
      border-bottom: 1px solid var(--color-border);
    }

    .hero-tag {
      display: inline-block;
      font-size: 0.8125rem;
      color: var(--color-text-muted);
      letter-spacing: 0.04em;
      margin-bottom: 18px;
      border: 1px solid var(--color-border);
      border-radius: 999px;
      padding: 4px 14px;
      background: rgba(255, 255, 255, 0.5);
    }

    .page-hero h1 {
      font-family: 'Noto Serif SC', serif;
      font-size: clamp(2.1rem, 4.5vw, 3.2rem);
      font-weight: 700;
      line-height: 1.18;
      color: var(--color-ink);
      margin-bottom: 18px;
      letter-spacing: -0.01em;
    }

    .hero-lead {
      font-size: 1.125rem;
      color: var(--color-text-secondary);
      max-width: 36em;
      margin-bottom: 0;
    }

    .hero-cover {
      position: relative;
      aspect-ratio: 16 / 10;
      overflow: hidden;
      border-radius: var(--radius-card);
      border: 1px solid var(--color-border);
      background: var(--color-card);
    }

    .hero-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .cover-badge {
      position: absolute;
      top: 12px;
      right: 12px;
      background: rgba(23, 23, 19, 0.72);
      color: #fff;
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 999px;
      letter-spacing: 0.03em;
    }

    /* ===== 区块标题 ===== */
    .section-head {
      margin-bottom: 44px;
    }

    .section-head h2 {
      font-family: 'Noto Serif SC', serif;
      font-size: clamp(1.6rem, 2.8vw, 2.3rem);
      font-weight: 600;
      line-height: 1.3;
      color: var(--color-text);
      letter-spacing: -0.01em;
    }

    .section-head h2::before {
      content: '';
      display: block;
      width: 32px;
      height: 2px;
      background: var(--color-accent);
      margin-bottom: 14px;
    }

    .section-head p {
      color: var(--color-text-secondary);
      font-size: 0.9375rem;
      margin-top: 8px;
    }

    /* ===== 攻略列表 ===== */
    .guide-list-section {
      padding: var(--space-section) 0 calc(var(--space-section) * 0.6);
      background: var(--color-bg);
    }

    .guide-lists {
      max-width: 920px;
    }

    .guide-list-item {
      display: flex;
      align-items: flex-start;
      padding: 30px 0;
      border-bottom: 1px solid var(--color-border);
      transition: background 0.2s ease;
    }

    .guide-list-item:first-child {
      border-top: 1px solid var(--color-border);
    }

    .guide-list-item:hover {
      background: rgba(255, 255, 255, 0.6);
    }

    .guide-list-item:hover .guide-info h3 {
      color: var(--color-accent-dark);
    }

    .guide-index {
      font-family: 'Noto Serif SC', serif;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--color-accent);
      margin-right: 32px;
      min-width: 42px;
      line-height: 2;
    }

    .guide-info {
      flex: 1;
      min-width: 0;
    }

    .guide-info h3 {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--color-text);
      margin-bottom: 6px;
      transition: color 0.2s ease;
    }

    .guide-info p {
      font-size: 0.9375rem;
      color: var(--color-text-secondary);
      margin-bottom: 6px;
      line-height: 1.65;
    }

    .guide-meta {
      font-size: 0.8125rem;
      color: var(--color-text-muted);
    }

    .guide-link {
      font-size: 0.875rem;
      font-weight: 500;
      color: var(--color-ink);
      border-bottom: 1px solid var(--color-border);
      padding-bottom: 2px;
      margin-left: 24px;
      white-space: nowrap;
      flex-shrink: 0;
      margin-top: 6px;
      transition: color 0.2s ease, border-color 0.2s ease;
    }

    .guide-link:hover {
      color: var(--color-accent);
      border-color: var(--color-accent);
    }

    /* ===== 要点区 ===== */
    .points-section {
      padding: var(--space-section) 0;
      background: var(--color-card);
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
    }

    .points-section h2 {
      font-family: 'Noto Serif SC', serif;
      font-size: clamp(1.6rem, 2.8vw, 2.3rem);
      font-weight: 600;
      line-height: 1.35;
      color: var(--color-text);
      margin-bottom: 20px;
      letter-spacing: -0.01em;
    }

    .points-section h2::before {
      content: '';
      display: block;
      width: 32px;
      height: 2px;
      background: var(--color-accent);
      margin-bottom: 14px;
    }

    .points-intro {
      color: var(--color-text-secondary);
      font-size: 1rem;
      max-width: 32em;
    }

    .point-pair {
      padding: 22px 0;
      border-bottom: 1px solid var(--color-border);
    }

    .point-pair:first-child {
      padding-top: 0;
    }

    .point-pair:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }

    .point-q {
      font-weight: 600;
      font-size: 1rem;
      color: var(--color-text);
      margin-bottom: 8px;
    }

    .point-a {
      color: var(--color-text-secondary);
      font-size: 0.9375rem;
      border-left: 2px solid var(--color-accent);
      padding-left: 16px;
      line-height: 1.7;
    }

    /* ===== 学习路径 ===== */
    .path-section {
      background: var(--color-ink);
      background-image: linear-gradient(rgba(23, 23, 19, 0.82), rgba(23, 23, 19, 0.82)), url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      padding: var(--space-section) 0;
      color: #fff;
    }

    .path-section .section-head h2 {
      color: #fff;
    }

    .path-section .section-head h2::before {
      background: var(--color-accent);
    }

    .path-section .section-head p {
      color: rgba(255, 255, 255, 0.65);
    }

    .path-item {
      border: 1px solid var(--color-border-dark);
      border-radius: var(--radius-card);
      padding: 30px 28px;
      background: rgba(42, 42, 38, 0.6);
      height: 100%;
      transition: border-color 0.2s ease, background 0.2s ease;
    }

    .path-item:hover {
      border-color: var(--color-accent);
      background: rgba(42, 42, 38, 0.85);
    }

    .path-item .path-num {
      font-family: 'Noto Serif SC', serif;
      color: var(--color-accent);
      font-size: 1rem;
      font-weight: 600;
      letter-spacing: 0.04em;
    }

    .path-item h3 {
      font-size: 1.125rem;
      font-weight: 600;
      color: #fff;
      margin: 12px 0 8px;
    }

    .path-item p {
      color: rgba(255, 255, 255, 0.72);
      font-size: 0.9375rem;
      line-height: 1.7;
      margin-bottom: 0;
    }

    /* ===== 分类导航 ===== */
    .category-nav-section {
      padding: var(--space-section) 0;
      background: var(--color-bg);
    }

    .cat-card {
      display: block;
      background: var(--color-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-card);
      padding: 30px 28px;
      height: 100%;
      transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    }

    .cat-card:hover {
      box-shadow: var(--shadow-2);
      border-color: var(--color-accent);
      transform: translateY(-2px);
    }

    .cat-card.current {
      border-color: var(--color-ink);
      box-shadow: var(--shadow-1);
      cursor: default;
    }

    .cat-card.current:hover {
      transform: none;
      border-color: var(--color-ink);
    }

    .cat-num {
      font-family: 'Noto Serif SC', serif;
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--color-accent);
    }

    .cat-card h3 {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--color-text);
      margin: 10px 0 6px;
    }

    .cat-card p {
      font-size: 0.875rem;
      color: var(--color-text-secondary);
      margin-bottom: 0;
      line-height: 1.65;
    }

    .cat-card .current-tag {
      display: inline-block;
      margin-top: 12px;
      font-size: 0.75rem;
      color: var(--color-accent);
      border: 1px solid var(--color-accent);
      border-radius: 999px;
      padding: 2px 10px;
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: var(--space-section) 0;
      background: var(--color-bg);
    }

    .faq-container {
      max-width: 760px;
    }

    .faq-item {
      border-bottom: 1px solid var(--color-border);
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px 0;
      font-family: 'Noto Sans SC', sans-serif;
      font-size: 1.0625rem;
      font-weight: 600;
      color: var(--color-text);
      text-align: left;
      background: none;
      border: none;
      line-height: 1.5;
      transition: color 0.2s ease;
    }

    .faq-question:hover {
      color: var(--color-accent-dark);
    }

    .faq-icon {
      flex-shrink: 0;
      width: 24px;
      height: 24px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 400;
      color: var(--color-accent);
      transition: transform 0.25s ease;
      line-height: 1;
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      display: none;
      padding: 0 16px 20px 18px;
      border-left: 2px solid var(--color-accent);
      margin-left: 2px;
    }

    .faq-item.open .faq-answer {
      display: block;
    }

    .faq-answer p {
      color: var(--color-text-secondary);
      font-size: 0.9375rem;
      line-height: 1.7;
      margin-bottom: 0;
    }

    /* ===== CTA ===== */
    .cta-section {
      background: var(--color-ink);
      color: #fff;
      text-align: center;
      padding: clamp(4rem, 7vw, 7rem) 0;
    }

    .cta-section h2 {
      font-family: 'Noto Serif SC', serif;
      font-size: clamp(1.6rem, 3vw, 2.4rem);
      font-weight: 600;
      line-height: 1.3;
      color: #fff;
      margin-bottom: 14px;
    }

    .cta-section p {
      color: rgba(255, 255, 255, 0.75);
      font-size: 1rem;
      max-width: 34em;
      margin: 0 auto 34px;
    }

    .cta-actions {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .cta-section .btn-outline-light {
      border-color: rgba(255, 255, 255, 0.65);
      color: #fff;
    }

    .cta-section .btn-outline-light:hover {
      border-color: var(--color-accent);
      color: var(--color-accent);
    }

    .cta-section .btn-primary {
      background: var(--color-accent);
      border-color: var(--color-accent);
      color: #fff;
    }

    .cta-section .btn-primary:hover {
      background: var(--color-accent-dark);
      border-color: var(--color-accent-dark);
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background: var(--color-ink);
      color: rgba(255, 255, 255, 0.75);
      padding: 60px 0 28px;
      border-top: 1px solid var(--color-border-dark);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 44px;
    }

    .footer-logo {
      font-family: 'Noto Serif SC', serif;
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      display: inline-block;
    }

    .footer-desc {
      color: rgba(255, 255, 255, 0.6);
      font-size: 0.875rem;
      line-height: 1.7;
      margin-top: 14px;
      max-width: 34em;
      margin-bottom: 0;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 0.9375rem;
      font-weight: 600;
      margin-bottom: 16px;
    }

    .footer-col li {
      margin-bottom: 10px;
    }

    .footer-col a {
      color: rgba(255, 255, 255, 0.6);
      font-size: 0.875rem;
      transition: color 0.2s ease;
    }

    .footer-col a:hover {
      color: var(--color-accent);
    }

    .footer-contact li {
      font-size: 0.875rem;
      color: rgba(255, 255, 255, 0.6);
    }

    .footer-bottom {
      border-top: 1px solid var(--color-border-dark);
      padding-top: 24px;
      text-align: center;
      color: rgba(255, 255, 255, 0.4);
      font-size: 0.8125rem;
    }

    .footer-bottom p {
      margin-bottom: 0;
    }

    /* ===== 浮动 CTA ===== */
    .float-cta {
      position: fixed;
      right: 32px;
      bottom: 40px;
      z-index: 90;
      background: var(--color-ink);
      color: #fff;
      border-radius: 999px;
      padding: 13px 26px;
      font-size: 0.9375rem;
      font-weight: 500;
      box-shadow: var(--shadow-2);
      transition: background 0.2s ease, transform 0.2s ease, opacity 0.25s ease;
      border: 1px solid rgba(255, 255, 255, 0.08);
      line-height: 1;
    }

    .float-cta:hover {
      background: var(--color-accent);
      color: #fff;
      transform: translateY(-2px);
    }

    .float-cta.hidden {
      opacity: 0;
      pointer-events: none;
    }

    /* ===== Foundation 覆盖 ===== */
    .cell,
    .grid-x {
      margin-left: 0;
      margin-right: 0;
    }

    .grid-margin-x > .cell {
      margin-left: 0;
      margin-right: 0;
    }

    a:focus-visible,
    button:focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 2px;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .guide-list-item {
        flex-wrap: wrap;
      }

      .guide-link {
        margin-left: 74px;
      }

      .footer-grid {
        gap: 32px;
      }
    }

    @media (max-width: 639px) {
      :root {
        --header-h: 60px;
      }

      .site-header {
        height: 60px;
      }

      .site-header.scrolled {
        height: 54px;
      }

      .header-row {
        height: 60px;
      }

      .site-header.scrolled .header-row {
        height: 54px;
      }

      .logo {
        font-size: 1.2rem;
      }

      .nav-toggle {
        display: flex;
      }

      .site-nav {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        display: none;
        border-bottom: 1px solid var(--color-border);
      }

      .site-nav.open {
        display: block;
      }

      .site-nav .nav-list {
        flex-direction: column;
        gap: 0;
        padding: 0;
      }

      .site-nav a {
        display: block;
        padding: 15px 24px;
        border-bottom: 1px solid var(--color-border);
        font-size: 1rem;
      }

      .site-nav a.active::after {
        display: none;
      }

      .site-nav a.active {
        background: rgba(196, 123, 61, 0.08);
        color: var(--color-accent-dark);
      }

      .nav-btn {
        display: none;
      }

      .page-hero {
        padding: calc(60px + 40px) 0 48px;
      }

      .page-hero h1 {
        font-size: clamp(1.8rem, 6vw, 2.2rem);
      }

      .hero-cover {
        margin-top: 32px;
        aspect-ratio: 4 / 3;
      }

      .guide-list-item {
        padding: 24px 0;
        flex-direction: column;
      }

      .guide-index {
        margin-right: 0;
        margin-bottom: 6px;
      }

      .guide-link {
        margin-left: 0;
        margin-top: 12px;
      }

      .point-pair {
        padding: 18px 0;
      }

      .path-item {
        margin-bottom: 16px;
        padding: 24px 20px;
      }

      .cat-card {
        margin-bottom: 16px;
        padding: 24px 20px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
        margin-bottom: 32px;
      }

      .footer-col {
        margin-bottom: 0;
      }

      .cta-actions {
        flex-direction: column;
        align-items: stretch;
        max-width: 320px;
        margin: 0 auto;
      }

      .float-cta {
        left: 0;
        right: 0;
        bottom: 0;
        border-radius: 0;
        height: 56px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(247, 245, 241, 0.96);
        color: var(--color-ink);
        border-top: 1px solid var(--color-border);
        box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.04);
        padding: 0;
      }

      .float-cta:hover {
        background: rgba(247, 245, 241, 0.96);
        color: var(--color-accent);
        transform: none;
      }

      .faq-question {
        font-size: 1rem;
        padding: 18px 0;
      }

      .faq-answer {
        padding-bottom: 18px;
      }
    }

    @media (min-width: 640px) and (max-width: 1024px) {
      .point-pair {
        padding: 18px 0;
      }

      .cat-card {
        padding: 24px 20px;
      }

      .path-item {
        padding: 24px 20px;
        margin-bottom: 16px;
      }

      .page-hero {
        padding-top: calc(var(--header-h) + 56px);
      }
    }

/* roulang page: category4 */
:root {
  --ink: #171713;
  --ink-light: #2a2a26;
  --accent: #c47b3d;
  --bg: #f5f1ea;
  --bg-card: #ffffff;
  --text: #26261f;
  --text-secondary: #6e6960;
  --text-muted: #9c968a;
  --border: #e7e2da;
  --border-dark: #3a3a34;
  --radius: 4px;
  --nav-h: 72px;
  --transition: 200ms ease;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.06);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 { margin: 0; line-height: 1.3; }
h1 {
  font-family: 'Noto Serif SC', 'Songti SC', serif;
  font-weight: 700;
  font-size: clamp(2.1rem, 4.5vw, 3.6rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}
h2 {
  font-family: 'Noto Serif SC', 'Songti SC', serif;
  font-weight: 600;
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  line-height: 1.3;
}
h3 { font-family: 'Noto Sans SC', sans-serif; font-weight: 600; font-size: 1.125rem; }
p { margin: 0; }
a { color: var(--text); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; }
.grid-container { max-width: 1200px; }
.section { padding: clamp(4.5rem, 8vw, 8rem) 0; }
.section-light { background: #fbf9f4; }
.narrow { max-width: 760px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease, transform 200ms ease;
}
.btn-primary {
  background: var(--ink);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent);
  color: #fff;
}
.btn-outline-light {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}
.btn-outline-light:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-outline-dark {
  background: transparent;
  border-color: var(--text);
  color: var(--text);
}
.btn-outline-dark:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-lg { height: 52px; padding: 0 32px; font-size: 1rem; }

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  height: var(--nav-h);
  background: transparent;
  transition: height 250ms ease, background 250ms ease, box-shadow 250ms ease;
}
.site-header.scrolled {
  height: 56px;
  background: rgba(247, 245, 241, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  transition: height 250ms ease;
}
.site-header.scrolled .header-row { height: 56px; }
.logo {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: baseline;
}
.logo .logo-dot {
  color: var(--accent);
  font-size: 1.6rem;
  line-height: 0;
  margin-left: 2px;
}
.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}
.site-nav .nav-list a {
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--text);
  padding: 4px 0;
  position: relative;
}
.site-nav .nav-list a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms ease;
}
.site-nav .nav-list a:hover::after,
.site-nav .nav-list a.active::after {
  transform: scaleX(1);
}
.site-nav .nav-list a:hover { color: var(--accent); }
.site-nav .nav-list a.active { color: var(--text); }
.nav-btn {
  margin-left: 8px;
  height: 38px;
  padding: 0 20px;
  font-size: 0.875rem;
  border-color: var(--text);
  color: var(--text);
  background: transparent;
}
.nav-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0 8px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  transition: transform 250ms ease, opacity 250ms ease;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== 页头 Hero ===== */
.page-hero {
  padding: calc(var(--nav-h) + 80px) 0 72px;
  background-color: #eae3d8;
  background-image: linear-gradient(to right, rgba(234, 227, 216, 0.92), rgba(234, 227, 216, 0.72)), url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--border);
}
.page-hero .hero-tag {
  display: inline-block;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 16px;
  margin-bottom: 24px;
  background: rgba(255, 255, 255, 0.4);
}
.page-hero h1 { margin-bottom: 16px; color: var(--ink); }
.page-hero .hero-sub {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}
.hero-actions .btn-outline-dark { border-color: var(--ink); }
.hero-media {
  position: relative;
  aspect-ratio: 16/10;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: #fff;
}
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.media-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(23, 23, 19, 0.75);
  color: #fff;
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

/* ===== 卖点对比区 ===== */
.security-compare .grid-x { align-items: flex-start; }
.security-compare h2 {
  margin-bottom: 20px;
  position: relative;
  padding-top: 16px;
}
.security-compare h2::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--accent);
}
.security-compare .lead-text {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
}
.pair-list {
  border-top: 1px solid var(--border);
}
.pair-item {
  padding: 28px 0 24px;
  border-bottom: 1px solid var(--border);
}
.pair-item .pair-question {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  font-family: 'Noto Sans SC', sans-serif;
}
.pair-item .pair-question i {
  color: var(--accent);
  font-size: 0.875rem;
  margin-top: 5px;
}
.pair-item .pair-solution {
  margin-left: 28px;
  border-left: 2px solid var(--accent);
  padding-left: 16px;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}
.security-compare .side-image {
  margin-top: 32px;
  aspect-ratio: 4/3;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fff;
}
.security-compare .side-image img { width: 100%; height: 100%; object-fit: cover; }

/* ===== 内容列表区 ===== */
.doc-list-sec {
  background: #fbf9f4;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-head {
  margin-bottom: 48px;
}
.section-head .eyebrow {
  display: block;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
  font-weight: 500;
}
.doc-list {
  border-top: 1px solid var(--border);
}
.doc-list-item {
  display: grid;
  grid-template-columns: 70px 1fr auto auto;
  gap: 20px;
  align-items: center;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  transition: background 200ms ease;
}
.doc-list-item:hover { background: rgba(255, 255, 255, 0.6); }
.doc-list-item .item-index {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.02em;
}
.doc-list-item .item-content h3 {
  margin-bottom: 6px;
}
.doc-list-item .item-content h3 a { color: var(--text); }
.doc-list-item .item-content h3 a:hover { color: var(--accent); }
.doc-list-item .item-content p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  max-width: 60ch;
}
.doc-list-item .item-date {
  font-size: 0.8125rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.doc-list-item .item-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 16px;
  transition: all 200ms ease;
  background: #fff;
}
.doc-list-item .item-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateX(2px);
}

/* ===== 流程区 ===== */
.process-section {
  background: var(--bg);
}
.process-section .section-title-wrap {
  text-align: center;
  margin-bottom: 56px;
}
.process-section .section-title-wrap h2 { margin-bottom: 12px; }
.process-section .section-title-wrap p {
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 24px;
}
.process-step {
  position: relative;
  padding: 32px 24px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 200ms ease, box-shadow 200ms ease;
}
.process-step:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.process-step .step-num {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 12px;
  border: 1px solid rgba(196, 123, 61, 0.3);
  border-radius: 2px;
}
.process-step h3 { margin-bottom: 8px; }
.process-step p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== 数据证据区 ===== */
.stats-section {
  background: var(--ink);
  padding: clamp(4rem, 7vw, 6rem) 0;
  position: relative;
}
.stats-band {
  display: grid;
  grid-template-columns: 1fr repeat(4, 1fr) 1fr;
  gap: 24px;
  align-items: center;
}
.stats-logo {
  height: 48px;
  opacity: 0.18;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  color: #fff;
  letter-spacing: 0.08em;
}
.stat-item {
  text-align: center;
  padding: 16px 8px;
}
.stat-item .stat-num {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}
.stat-item .stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 6px;
}

/* ===== FAQ ===== */
.faq-section .narrow-head { text-align: center; margin-bottom: 48px; }
.faq-section .narrow-head h2 { margin-bottom: 10px; }
.faq-section .narrow-head p { color: var(--text-secondary); }
.accordion {
  border-top: 1px solid var(--border);
}
.accordion-item {
  border-bottom: 1px solid var(--border);
}
.accordion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
}
.accordion-title:hover { color: var(--accent); }
.accordion-title .acc-icon {
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--accent);
  transition: transform 250ms ease;
  line-height: 1;
}
.accordion-item.is-active .accordion-title .acc-icon {
  transform: rotate(45deg);
}
.accordion-content {
  padding: 0 0 24px;
  margin-left: 28px;
  border-left: 2px solid var(--accent);
  padding-left: 18px;
}
.accordion-content p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ===== 分类导航 ===== */
.category-nav-section {
  background: #efebe4;
  border-top: 1px solid var(--border);
}
.category-nav-section .section-heading {
  text-align: center;
  margin-bottom: 48px;
}
.category-nav-section .section-heading .eyebrow {
  display: block;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 10px;
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
  display: flex;
  flex-direction: column;
  min-height: 180px;
}
.category-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(196, 123, 61, 0.4);
}
.category-card.active-card {
  border-color: var(--accent);
  background: #fff;
}
.category-card .cat-icon {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(196, 123, 61, 0.1);
  color: var(--accent);
  border-radius: 2px;
  margin-bottom: 16px;
  font-size: 1rem;
}
.category-card h3 { margin-bottom: 8px; }
.category-card h3 a { color: var(--text); }
.category-card h3 a:hover { color: var(--accent); }
.category-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}
.category-card .cat-link {
  margin-top: 16px;
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.category-card .cat-link i { transition: transform 200ms ease; }
.category-card .cat-link:hover i { transform: translateX(4px); }

/* ===== CTA区 ===== */
.cta-section {
  background: var(--ink);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(196, 123, 61, 0.5), transparent);
}
.cta-section .cta-inner { max-width: 640px; margin: 0 auto; }
.cta-section h2 {
  color: #fff;
  margin-bottom: 14px;
}
.cta-section p {
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 36px;
  font-size: 1rem;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-actions .btn-outline-light { border-color: rgba(255, 255, 255, 0.4); color: #fff; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-dark);
}
.footer-logo {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  display: inline-block;
  margin-bottom: 12px;
}
.footer-desc {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.7;
  max-width: 360px;
}
.footer-col h4 {
  color: #fff;
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.875rem;
  transition: color 200ms ease;
}
.footer-col ul li a:hover { color: var(--accent); }
.footer-contact li {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.875rem;
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.footer-contact li i {
  color: var(--accent);
  font-size: 0.8125rem;
  margin-top: 4px;
}
.footer-bottom {
  padding: 24px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.35);
}

/* ===== 浮动CTA ===== */
.float-cta {
  position: fixed;
  bottom: 36px;
  right: 32px;
  z-index: 99;
  background: var(--ink);
  color: #fff;
  border-radius: 999px;
  padding: 12px 22px;
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transition: background 200ms ease, transform 200ms ease, opacity 200ms ease;
  border: 1px solid transparent;
}
.float-cta i { font-size: 0.8125rem; }
.float-cta:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}
.float-cta.hidden {
  opacity: 0;
  pointer-events: none;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 18px 0 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { margin: 0 10px; color: var(--text-muted); opacity: 0.6; }
.breadcrumb .current { color: var(--text); font-weight: 500; }

/* ===== 响应式 ===== */
@media (max-width: 64em) {
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-band { grid-template-columns: repeat(4, 1fr); }
  .stats-band .stats-logo { display: none; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 40em) {
  .section { padding: 3rem 0; }
  .site-header { height: 60px; }
  .header-row { height: 60px; }
  .site-header.scrolled { height: 56px; }
  .site-header.scrolled .header-row { height: 56px; }
  .nav-toggle { display: flex; }
  .nav-btn { display: none; }
  .site-nav {
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 24px;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 250ms ease, opacity 250ms ease;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
  }
  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
  }
  .site-nav .nav-list {
    flex-direction: column;
    gap: 0;
    align-items: stretch;
  }
  .site-nav .nav-list li { border-bottom: 1px solid var(--border); }
  .site-nav .nav-list li:last-child { border-bottom: none; }
  .site-nav .nav-list a {
    display: block;
    padding: 14px 0;
    font-size: 1rem;
  }
  .site-nav .nav-list a::after { display: none; }
  .page-hero {
    padding: calc(60px + 48px) 0 48px;
  }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-media { margin-top: 32px; }
  .process-grid { grid-template-columns: 1fr; gap: 16px; }
  .stats-band { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-item { padding: 8px 4px; }
  .category-grid { grid-template-columns: 1fr; }
  .doc-list-item {
    grid-template-columns: 48px 1fr;
    gap: 14px;
    padding: 22px 0;
  }
  .doc-list-item .item-date {
    grid-column: 2;
    margin-top: -8px;
  }
  .doc-list-item .item-link {
    grid-column: 2;
    justify-self: start;
    margin-top: 4px;
  }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .float-cta {
    bottom: 0;
    right: 0;
    left: 0;
    width: 100%;
    border-radius: 0;
    height: 56px;
    justify-content: center;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.06);
    border-top: 1px solid var(--border);
  }
}

@media (max-width: 520px) {
  .grid-container { padding-left: 20px; padding-right: 20px; }
  .page-hero h1 { font-size: 2rem; }
  .security-compare .grid-x { row-gap: 32px; }
  .accordion-title { font-size: 1rem; padding: 18px 0; }
  .accordion-content p { font-size: 0.875rem; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .cta-actions .btn { width: 100%; }
}